A manga by Kashiwaba Hiro, about HalfIdenticalTwins. Kou, the brother, is very feminine, excels at cooking, cleaning, arts and crafts, while Tsukiko, the sister, is masculine, loves fighting and is a combat genius. The twins learn about the Samurai High School, where men test their strength and women test their femininity. However the only way they can attend is by [[WholesomeCrossdresser swapping places]]. If they are to be found cheating, they and their family will be [[DisproportionateRetribution exiled to the moon for 500 years]].

Have nothing to do with the [[Series/SamuraiHighSchool TV series]] with the same name.

----!!''Samurai High School'' provides examples of:

* AbhorrentAdmirer: School nurse Tomita is in love with Onikanda, whom he affectionately calls "Oni-chan". The latter is repulsed by this and wants nothing to do with him.* ActionGirl: Tsukiko is a martial arts expert who loves physical training and fighting. She's also one of the strongest characters in the series.* AllegedLookalikes: Tsukiko and Kou are portrayed as HalfIdenticalTwins and can switch identities at whim without anyone's notice, even though their vastly differing height, body type, hairstyle and facial expression makes their appearances very distinct from each other.* AwesomenessByAnalysis: Nothing escapes Mariri's keen eyesight, and she could immediately tell that Tsukiko is a girl by a single glance. She's also the only one who can tell when Tsukiko and Kou pull a TwinSwitch.* BerserkButton: While Kou is normally timid and passive, he becomes bossy and aggressive whenever his sister is concerned.* BoobsOfSteel: Tsukiko is by far the strongest girl in the manga. Her bust size is also noticeably larger than the other female cast.* ButtMonkey: Nobody really takes Kamiyama seriously (except perhaps his two bodyguards), and every time he tries to draw the spotlight to himself, he either gets ignored or snarked. He also gets frequently beaten up by Tsukiko.* CharacterDevelopment: Kamiyama grows from being a completely self-absorbed UpperClassTwit, to actually showing concern and even respect for his "low-class" friends. This culminates in him ditching his rich peers during his birthday party when they went too far to insult his newfound friends. * CutShort: It starts rushing towards the end in Chapter 24 with [[spoiler:[[UnsettlingGenderReveal Kou and Tsukiko's scheme exposed]]]] and rapidly wraps things up in the next chapter, with [[spoiler:the two [[AndTheAdventureContinues being allowed to continue attending the school]]]]. Sadly, some side plot elements are LeftHanging. * DarkHorseVictory: In the "King and Queen contest" held on Chapter 15, the teachers started betting on who would win: Kou or Sakurada. But near the end of the competition, Kamiyama accidentally activated some trap that messes up the arena. Tsukiko splits with Sakurada to save him, while Sakurada himself left to be with Mariri. The winner is some random couple who weren't even named.* DoggedNiceGuy: Sakurada clearly loves Mariri more than she does him -- he eagerly tries to get her on a date with him and behaves like an excited puppy around her, while she only cares about marrying the strongest of the strong and is obsessed with trying to get Tsukiko marry her younger brother.* DoubleStandard: The boy Tsukiko has a crush on could accept the idea of losing a fight to a underclassman better than he accepts the idea of [[spoiler:losing to a girl, as evidenced when he learned it was Tsukiko and not Kou who defeated him. And that's because he used to encourage her before the beginning of the series]].* EatenAlive: In the BeachEpisode, Tsukiko and Kamiyama fell of a cliff and got eaten by a giant fish. The whole thing is PlayedForLaughs, and the story continues in the next chapter as though it never happened.* EffortlessAmazonianLift: Tsukiko can easily walk while carrying three people. She can even chase a thief while carrying them.* {{Expy}}: Kaya is a very obvious parody of Princess Kaguya.* GagSeries: Almost everything that happens in the story are PlayedForLaughs, and any time a serious conflict arise, they rarely affect anyone too badly and gets resolved quite quickly.* GrievousHarmWithABody: During the boys' entrance exam, Tsukiko uses Kamiyama to beat up giant monsters. It was pretty much the reason the latter was able to pass, as the examiners thought they were working together.* HeroicBSOD: Tsukiko went to a brief comatose when she discovered that her crush, Sakurada, has a fiancée. * HowWeGotHere: Chapter 16 of the manga. It started with the twins being followed by members of the newspaper club and then it went back to when and how it began. Chapter 23 also invokes the trope.* IWantMyBelovedToBeHappy: A humourous variant: Namisa's obsessive fan club seem to be surprisingly alright with her declaring "Kou" as her PrinceCharming. Some of them even helped her prepare a wedding ceremony with "him", knowing that it will make her happy.* IWasBeatenByAGirl: One of the guys Tsukiko defeated had this reaction upon learning it was her and not her brother who defeated him.* JerkWithAHeartOfGold: Kamiyama is an annoying UpperClassTwit who looks down on everyone around him (calling them "low class" or "commoners") and treats Tsukiko as his servant. Despite this, he becomes genuinely concerned for her when she got sick.* LethalChef: Tsukiko's first attempt to cook almost destroyed the kitchen, and caused physical injuries to her classmates.* LongHairIsFeminine: When Tsukiko decided to enter school as a boy, she considered cutting her hair but her brother said it'd not be necessary. Just holding it in a ponytail would be enough. He was right. Also, he wore a wig to pose as his sister.* MagicalRealism: The series features aliens, monsters, and various strange creatures, and Kamiyama frequently dabbles in what appears to be some weird form of magic. But the story focuses more on the twins' life as they try to assume each other's identities without being found out by the rest of the school.* MistakenForGay: After rescuing Tsukiko from the farce wedding that Namise had set up for them, Kamiyama brought her back to school by {{Bridal carry}}ing her. Since Tsukiko was in a male disguise, this becomes a scandal when their school mates mistook them for a couple.* MasculineGirlFeminineBoy: A platonic example. Sakakido Kou, the younger brother, is very good at doing house work, such as cleaning, cooking and sewing; whereas the older sister, Tsukiko is very much a samurai-like fighter.* MsFanservice: Although there isn't much {{Fanservice}}, when it does show up, Tsukiko is the focus.* MySisterIsOffLimits: Kou is very dependent on his sister and constantly behaves like a ClingyJealousGirl for her. He gets enraged when other people, be they guy or girl, gets too intimate with Tsukiko.* NeverMyFault: In the first chapter, Tsukiko says the reason she's mistaken for a guy is that her brother doesn't act like one.* NewOldFlame: Averted with SchoolIdol Namisa, who was revealed to be Kamiyama's childhood love interest. But aside from that initial reveal, their past relationship was never really touched upon. * NoCelebritiesWereHarmed: Shogun Habama is clearly based on President Barack Obama. They share similar facial features and, as Obama is the first black U.S. President, Habama is the first Alien Immigrant who got elected as Shogun. * NonActionGuy: Kou is a weakling who can barely lift a bat. * OutOfFocus: Kou started off as a co-star with some chapters giving him focus, but he gets relegated to supporting character status as the series became more focused on Tsukiko * OverprotectiveDad: Kaya's father does not appreciate guys coming near his daughter, and even has 5 underlings to beat up anyone who dares make a physical contact with her. * PolarOppositeTwins: Sakakido Kou and his sister Sakakido Tsukiko are MasculineGirlFeminineBoy.* ReasonableAuthorityFigure: Martial Shogun Habama is a very easy-going guy despite his power. During his visit to the school, Tsukiko and Kamiyama started to fight and accidentally crashed in front of him, he simply laughed about how lively the students are. Later, when [[spoiler:Tsukiko's true identity is discovered, he gets moved by her passionate speech, and allows her to continue her studies as herself, only giving her and Kou a punishment of a 6 months worth of supplementary classes, rather than a 500-year exile that was the rule]].* SchoolIdol: Namisa is pretty much worshipped by all the male students in Samurai High.* SeriousBusiness: Tomita takes school plays ''very'' seriously and was willing to beat the crap out of his "beloved" Onikada when the latter failed to do the same.* ShipperOnDeck: Of sorts. Mariri is fascinated Tsukiko's willpower and wants her to be a part of the Kamiyama family. But since she obviously can't marry her herself, she would rather ensure that Tsukiko marries her younger brother, Tomoza.* ShoutOut** In the physical assessment chapter, Tsukiko's punch is measured as over 5000. This references the famous ''Manga/DragonBall'' line (it was changed to 9000 for the dub because it fit the mouth flaps better).** In the ChristmasEpisode, a Santa applicant was dressed like [[VideoGame/SuperMarioBros Mario]] and trying to get down a chimney that looked like the pipes from the Mario games.** During the Snow White play a few panels have Tommy and Kaya appearing as Tsukikage-sensei and Maya from ''Manga/GlassMask''.* SiblingYinYang: Tomoza Kamiyama is an annoying loudmouth who never misses the opportunity to scream about how great he is, despite the fact that he's an incompetent moron who can barely achieve anything without his two bodyguards, and is taken seriously by no one. His older sister, Mariri, is a very charismatic AloofDarkHairedGirl whom the whole school admires, and is even considered an OneeSama by Namisa.* SkinshipGrope* SweetPollyOliver: Tsukiko disguises herself as a guy, so that she graduate as Samurai High's top (male) student and eventually become the Shogun.* ThoseTwoGuys: Kamiyama's two bodyguards who solely exists to follow him around and get the brunt of his weird antics.* TinyGuyHugeGirl: Exaggerated. The Kamiyamas' patriarch is a diminutive man whose height barely reaches a normal person's knee. His wife is a gigantic woman that is at least two times taller than everyone else.* TomboyWithAGirlyStreak: For all her manliness, Tsukiko doesn't really appreciate being mistaken as a guy, and behaves like a normal, smitten teenage girl whenever she's around Sakurada.* {{Tsundere}}: Kamiyama is a Type A towards Tsukiko, and Aya (When agressive) is a Type A to Kou.* TwinSwitch: Kou and Tsukiko entered Samurai High School by posing as each other. They occasionally switched back whenever Tsukiko wanted to go on a date with her crush or watch her idol.* TwoTeacherSchool: The only teachers we get to see are Nobara and Onikanda. Other staff include Tomita "Tommy", the school nurse, and the mostly unseen principal.* UglyGuysHotDaughter: Simultaneously played straight ''and'' gender inverted with the Kamiyama family. Tomoza and Mariri are quite good-looking. Their parents are {{Gonk}}s who barely look human.* UpperClassTwit: Kamiyama is a "high class samurai" who constantly flaunts his status and wealth, and never goes anywhere without his two bodyguards.* UntoUsASonAndDaughterAreBorn: Kou and Tsukiko were newborns at the beginning of the manga.* WholesomeCrossdresser: Kou wears a long-haired wig and dresses to assume Tsukiko's identity in Samurai High.* YamatoNadeshiko: Samurai High School trains girls for this role.